User's Manual

March 1, 2002 Page E3
Hub Installation Detail
Installation Detail – Outdoor Unit (ODU)
Cable connections
It will be more convenient to connect the ODU cables and close the headend rear weather cap
prior to attaching the ODU to its mounting pipe. Refer to the Schematic Diagram – Outdoor
Unit on the previous page.
Remove the sixteen screws securing the rear weather cap to the anodized aluminum back plate
of the antenna, taking care not to damage the gasket around the weather cap. This will reveal
two aluminum housings containing the ARCi outdoor electronics
1
. The upper housing contains
the receiver and the lower the transmitter. Note the F-female and power/telemetry
2
connectors
on the bottom of each.
Attach the receive
(upstream) RG-6 to the F connector on the upper electronics housing and
the transmit
(downstream) RG-6 to the F connector on the lower electronics housing. ARCi
recommends the use of premium quad-shielded RG-6 coaxial cable (such as Belden 1189A) for
headend installations.
Attach the ARCi-provided power/telemetry “Y” cable to the connectors on both electronics
housings (connectors are interchangeable). Note that the power/telemetry connector is keyed
and must be rotated into the correct position prior to seating. The locking ring is quite stiff and
must be turned approximately ¼ turn clockwise for proper connection. Be sure that the
upstream and downstream RG-6 and the power/telemetry cables clear the mounting screw
holes for the rear weather cap. Refer to the photograph in Figure E1. Dress the cables as
shown in the photograph and secure with a tie-wrap below the lower electronics housing.
Although the power/telemetry connectors are interchangeable, the method illustrated in the
photograph will produce best results.
It is not necessary to disturb the SMA coaxial connector on the top of each electronics housing.
This is the connection to the actual antenna panel.
Replace the headend rear weather cap taking care that the gasket is seated smoothly around
the edge of the weather cap and that the three cables pass through the cable access on the
bottom end of the weather cap. Replace the sixteen screws securing the weather cap snugly
but not tightly enough to distort the gasket. See Figure E2.
1
Complete replacement of one or both of the aluminum housings containing the electronic assemblies is the only
user service possible for the ARCi headend ODU.
2
The pin connection information is detailed on the last page of this chapter – it is not normally needed as ARCi
supplies the power/telemetry cable.